Cambridge Audio 840C User Manual
azur 840C
Upsampling compact disc player
User’s manual
2 Azur upsampling compact disc player
Introduction .................................................................................................3
Safety precautions ......................................................................................4
Important safety instructions .....................................................................5
Rear panel connections..............................................................................6
Front panel controls....................................................................................8
Remote control..........................................................................................10
Remote control of matching products.....................................................11
Operating instructions..............................................................................12
External digital sources ............................................................................15
CD player setup.........................................................................................16
Custom installation use............................................................................18
Troubleshooting.........................................................................................18
Technical specifications ...........................................................................19
Limited warranty .......................................................................................20
CONTENTS
Azur upsampling compact disc player 3
Thank you for purchasing this Azur 840C Upsampling Compact Disc
Player. This unit is part of our new '8' series range, taking Cambridge
Audio to new levels of audio excellence. The 8 series range has been
developed as part of our commitment to the on-going development of
the Azur range. We hope that you will appreciate the results and enjoy
many years of listening pleasure from it.
The 840C incorporates a raft of new technologies and features. Key to
its abilities is the ATF
TM
(Adaptive Time Filtering) upsampling process developed in conjunction with Anagram Technologies of Switzerland.
This system intelligently interpolates 16 bit/44.1kHz CD (or other) data
to 24bit/384kHz through the use of a 32 bit Analog Devices Black Fin
DSP (Digital Signal Processor) for the very best sound quality. The ATF
system applies sophisticated polynomial curve fitting interpolation and
incorporates a time domain model which allows data buffering and reclocking almost completely eradicating digital jitter.
Because the audio data rate is so high aliasing artefacts are moved way
above audible frequencies allowing us to use a low order 2 pole linearphase Bessel filter on the output for constant group delay and minimal
phase shift.
Two very high quality Analog Devices AD1955 24 bit DACs (Digital to
Analog Converters) are used in dual differential mode. As each channel
has its own DAC to process information, completely separate and
symmetrical analog filter circuitry can be implemented. These allow
both left and right channel circuitry to operate identically, ensuring the
840C delivers fantastic sound-staging and stereo imaging properties. All
filtering from DACs to output is also fully differential using unique
differential output amplifiers.
This fully balanced configuration largely rejects the already very low
noise and distortion products present in the DACs and filters and
provides an unprecedented level of performance.
A true balanced (XLR) output is fitted as well as a summed conventional
unbalanced phono/RCA output. Automatic DC servo circuits null all DC
offsets allowing no capacitors in the signal path at all.
Two digital inputs are fitted allowing other digital sources to be brought
into the 840C and upsampled, the 840C then working as a very high
quality DAC.
A digital output is also fitted which can even output upsampled data at
various rates and word widths, independent from the main audio output,
which is always set at 24/384 for best sound quality.
In addition to these audiophile features Control Bus Input/Output, IR
Emitter Input and RS232 control are provided to make it easy to
integrate this unit into Custom Installation systems if desired.
A completely new 8-series casework has been designed which combines
massive structural rigidity with careful damping and control of acoustic
resonance. An Azur Navigator remote control is also provided, giving full
remote control of your CD player and Azur amplifiers in an attractive and
easy to use handset.
Your CD player can only be as good as the system it is connected to.
Please do not compromise on your amplifier, speakers or cabling.
Naturally we particularly recommend amplification from the Cambridge
Audio Azur range, and in particular the 840A Integrated Amplifier which
has been designed to the same exacting standards as this CD player.
Your dealer can also supply excellent quality Cambridge Audio
interconnects to ensure your system realises its full potential.
Thanks for taking the time to read this manual; we do recommend you
keep it for future reference.
Matthew Bramble, Technical Director
INTRODUCTION
840C Upsampling compact disc player
4 Azur upsampling compact disc player
Checking the Power Supply Rating
For your own safety please read the following instructions carefully before attempting
to connect this unit to the mains.
Check that the rear of your unit indicates the correct supply voltage. If your mains
supply voltage is different, consult your dealer.
This unit is designed to operate only on the supply voltage and type that is
indicated on the rear panel of the unit. Connecting to other power sources may
damage the unit.
This equipment must be switched off when not in use and must not be used unless
correctly earthed. To reduce the risk of electric shock, do not remove the unit's
cover (or back). There are no user serviceable parts inside. Refer servicing to
qualified service personnel. If the power cord is fitted with a moulded mains plug
the unit must not be used if the plastic fuse carrier is not in place. Should you lose
the fuse carrier the correct part must be reordered from your Cambridge Audio
dealer.
The lightning flash with the arrowhead symbol within an equilateral
triangle is intended to alert the user to the presence of un-insulated
‘dangerous voltage’ within the product’s enclosure that may be of
sufficient magnitude to constitute a risk of electric shock to
persons.
The exclamation point within an equilateral triangle is intended to
alert the user to the presence of important operating and
maintenance instructions in the service literature relevant to this
appliance.
This product complies with European Low Voltage (73/23/ EEC)
and Electromagnetic Compatibility (89/336 /EEC) Directives
when used and installed according to this instruction manual. For
continued compliance only Cambridge Audio accessories should
be used with this product and servicing must be referred to
qualified service personnel.
The crossed-out wheeled bin is the European Union symbol for
indicating separate collection for electrical and electronic
equipment. This product contains electrical and electronic
equipment which should be reused, recycled or recovered and
should not be disposed of with unsorted regular waste. Please
return the unit or contact the authorised dealer from whom you
purchased this product for more information.
Plug Fitting Instructions (UK Only)
The cord supplied with this appliance is factory fitted with a 13 amp mains plug
fitted with a 3 amp fuse inside. If it is necessary to change the fuse, it is important
that a 3 amp one is used. If the plug needs to be changed because it is not suitable
for your socket, or becomes damaged, it should be cut off and an appropriate plug
fitted following the wiring instructions below. The plug must then be disposed of
safely, as insertion into a 13 amp socket is likely to cause an electrical hazard.
Should it be necessary to fit a 3-pin BS mains plug to the power cord the wires
should be fitted as shown in this diagram. The colours of the wires in the mains
lead of this appliance may not correspond with the coloured markings identifying
the terminals in your plug. Connect them as follows:
The wire which is coloured BLUE must be
connected to the terminal which is marked
with the letter ‘N’ or coloured BLACK.
The wire which is coloured BROWN must be
connected to the terminal which is marked
with the letter ‘L’ or coloured RED.
The wire which is coloured GREEN/YELLOW
must be connected to the terminal which is
marked with the letter ‘E’ or coloured GREEN.
If your model does not have an earth wire, then disregard this instruction.
If a 13amp (BS 1363) plug is used, a 3amp fuse must be fitted, or if any other type
of plug is used a 3amp or 5 amp fuse must be fitted, either in the plug or adaptor,
or on the distribution board.
SAFETY PRECAUTIONS
WARNING - To reduce the risk of fire or electric shock, do not expose this unit
to rain or moisture. This unit must not be used near or exposed to dripping or
splashing water or other liquids. No objects filled with liquid, such as vases,
shall be placed on the unit. In the event, switch off immediately, disconnect
from the mains supply and contact your dealer for advice.
Ensure that small objects do not fall through any ventilation grille. If this
happens, switch off immediately, disconnect from the mains supply and
contact your dealer for advice.
To turn the unit off completely switch off on the rear panel. If you do not
intend to use this unit for a long period of time, unplug it from the mains
socket. Unplug this unit during lightning storms.
To clean the unit, wipe its case with a dry, lint-free cloth. Do not use any
cleaning fluids containing alcohol, ammonia or abrasives. Do not spray an
aerosol at or near your CD player.
This unit is not user serviceable, never attempt to repair, disassemble or
reconstruct the unit if there seems to be a problem. Servicing is required
when the unit has been damaged in any way, such as power-supply cord or
plug is damaged, liquid has been spilled or objects have fallen into it, the unit
has been exposed to rain or moisture, does not operate normally or has been
dropped. A serious electric shock could result if this precautionary measure
is ignored.
Important Note
This unit has been designed to play compact discs,
recordable CDs (CD-R) and re-writable CDs (CD-RW)
bearing the identification logo shown here. No other discs
can be used. The CD-R/CD-RW discs should contain
properly recorded TOC (Table of Contents) information so
that they can be played back. This unit can play only the discs recorded in the
CD-DA format designed for music reproduction. Do not attempt to play a disc
on this unit containing other data, such as a CD-ROM for PCs.
840C Upsampling compact disc player
Azur upsampling compact disc player 5
Please take a moment to read these notes before installing your Azur CD
player, they will enable you to get the best performance and prolong the life
of the product. We advise you follow all instructions, heed all warnings and
keep the instructions for future reference.
The unit is of Class 1 construction and must be connected to a Mains socket
outlet with a protective earthing connection.
Only use the specified attachments/accessories with this unit.
Do not defeat the safety purpose of the polarized or grounding-type plug. A
polarized plug has two blades with one wider than the other. A grounding type
plug has two blades and a third grounding prong. The wide blade or the third
prong are provided for your safety. If the provided plug does not fit into your
outlet, consult an electrician for replacement of the obsolete outlet.
The unit must be installed in a manner that makes disconnection of the
mains plug from the mains socket outlet (or appliance connector from the
rear of the unit) possible. Where the mains plug is used as the disconnect
device, the disconnect device shall remain readily operable. Protect the
power cord from being walked on or pinched particularly at plugs,
convenience receptacles, and the point where they exit from the unit.
This unit must be installed on a sturdy, level surface. Do not place
in a sealed area such as a bookcase or in a cabinet. Any space open
at the back (such as a dedicated equipment rack) is fine however.
When a cart is used, use caution when moving the cart to avoid
injury from tip-over.
The unit requires ventilation. Do not situate it on a rug or other soft surface
and do not obstruct any air inlets or outlet grilles.
Do not install near any heat sources such as radiators, heat registers, stoves,
or other apparatus (including amplifiers) that produce heat.
IMPORTANT SAFETY INSTRUCTIONS
6 Azur upsampling compact disc player
Power On/Off
Switches the unit on and off.
Mains Voltage Selector Switch
Switches the mains voltage between 115V and 230V. For use by
installer/dealer only.
AC power socket
Once you have completed all connections to the amplifier, plug the AC
power cable into an appropriate mains socket then switch on. Your
compact disc player is now ready for use.
REAR PANEL CONNECTIONS
RS232C
The RS232C port allows some external serial control of the 840C for
custom install use. A command set is available on the Cambridge Audio
website at www.cambridge-audio.com. This port can also be used by
Cambridge Audio service personnel for software updates.
IR (Infra Red) Emitter In
Allows modulated IR commands from multi-room systems or IR repeater
systems to be received by the amplifier. Commands received here are
not looped out of the Control Bus. Refer to the ‘Custom Installation’
section for more information.
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2
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Power
On Off
Mains Voltage Selector Switch
115V/230V AC~50/60Hz
Designed in London, England
azur 840C Upsampling Compact Disc Player
Max Power Consumption: 40W
www.cambridge-audio.com
Power AC
Caution
Risk of electric shock. Do not open.
Risque de choc electrique. Ne pas ouvrir.
Achtung
Vorm öffnen des gerätes. Netzstecker ziehen.
RS232C IR Emitter
Avis
N1863
Control Bus
InIn Out
Digital Outputs
S/P DIF
Co-axial
Toslink
Optical
Incorporating Q5™ from:
ANAGRAM
TECHNOLOGIES
Digital Input 1
S/P DIF
Co-axial
Toslink
Optical
Digital Input 2
S/P DIF
Co-axial
Balanced Audio OutUnbalanced Audio Out
Left
Class 1 Laser Product
Luokan 1 Laserplaite
Klass 1 Laserapparat
Toslink
Optical
Left
Right
Right
Manufactured in an
ISO9002 approved facility
GND
Right Left
RightLeft
840C Upsampling compact disc player
Azur upsampling compact disc player 7
Control Bus
In - Allows un-modulated commands from multi-rooms systems or other
components to be received by the unit.
Out - Loop out for control bus commands to another unit.
Digital outputs
The digital outputs allow a separate DAC or digital recording device to be
connected. The sophisticated DSP software in the 840C even allows
these outputs to be set to output raw (pass through) or upsampled data
independently from the main audio outputs. Refer to the ‘Operating
instructions’ section for more information.
S/P DIF CO-axial Digital - To obtain best results, use a high quality 75
ohm digital RCA interconnect cable (not one designed for normal audio
use).
Toslink Optical Digital - Use a high quality TOSLINK fibre optic
interconnect cable designed specifically for audio use.
Only one of the two output types should be used at a time.
& Digital Inputs 1 / 2
The digital inputs allow the digital outputs of other source components
to be connected to the 840C. The 840C can then act as a very high
quality upsampling DAC, improving the sound quality of the connected
sources. Two digital inputs allow two external sources to be connected:
S/P DIF CO-axial Digital - Use a high quality 75 ohm digital RCA
interconnect cable (not one designed for normal audio use).
Toslink Optical Digital - Use a high quality TOSLINK fibre optic
interconnect cable designed specifically for audio use.
Only one of the two input types for each input should be used at a time.
Unbalanced Audio Out
Single-ended conventional stereo outputs for connection to the line-level
phono/RCA inputs of an amplifier.
Balanced Audio Out
The 840C also features true balanced (XLR) outputs. This is a higher
quality output that can reject noise and interference in the cable when
used with equipment with balanced inputs. XLR connectors should be
wired: Pin 1 - Ground; Pin 2 - Hot (in-phase); Pin 3 - Cold (phaseinverted).
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